6403524 ÷ 860 
Our goal is to divide 6403524 by 860.

Moving on to step 1:
When dividing 6 by 860, we get 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 860

On to step 2:
When dividing 64 by 860, we get 0 with a remainder of 64.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Take the next digit (0) from the dividend and append it to 64, then repeat: 640 / 860

On to step 3:
If we divide 640 by 860, we get 0 and a remainder of 640.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 640, we end up with 640.
Take the next digit (3) from the dividend and append it to 640, then repeat: 6403 / 860

Going ahead to step 4:
The number 860 fits into 6403 7 times, leaving a remainder of 383.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Subtract 6020 from 6403 to get 383.
Grab the next digit (5) from the dividend, add it to 383, then carry on: 3835 / 860

Step 5:
When dividing 3835 by 860, we get 4 with a remainder of 395.
Write down 4 as next digit of the result. 
Result so far: 74.0
If we take 3440 away from 3835, we end up with 395.
Fetch the next digit (2) from the dividend, attach it to 395 and continue: 3952 / 860

Step 6:
3952 divided by 860 is 4 with a remainder of 512.
Use 4 as the next digit of our solution. 
Result so far: 744.0
Deduct 3440 from 3952 and we're left with 512.
Fetch the next digit (4) from the dividend, attach it to 512 and continue: 5124 / 860

Step 7:
860 goes into 5124 5 times with a remainder of 824.
The number 5 becomes the next digit in our result. 
Result so far: 7445.0
Deduct 4300 from 5124 and we're left with 824.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8240, and continue the process.

Going ahead to step 8:
The number 860 fits into 8240 9 times, leaving a remainder of 500.
Write down 9 as next digit of the result. 
Result so far: 7445.9
If we subtract 7740 from 8240, we get 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Moving on to step 9:
860 goes into 5000 5 times with a remainder of 700.
Write down 5 as next digit of the result. 
Result so far: 7445.95
Subtracting 4300 from 5000 leaves us with 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7000, and continue the process.

Advancing to step 10:
If we divide 7000 by 860, we get 8 and a remainder of 120.
Put 8 as the next digit of the answer. 
Result so far: 7445.958
Subtracting 6880 from 7000 leaves us with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Moving on to step 11:
When dividing 1200 by 860, we get 1 with a remainder of 340.
Record the quotient 1 as the next digit in the result. 
Result so far: 7445.9581
Subtracting 860 from 1200 leaves us with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Advancing to step 12:
860 goes into 3400 3 times with a remainder of 820.
Put 3 as the next digit of the answer. 
Result so far: 7445.95813
If we take 2580 away from 3400, we end up with 820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8200, and continue the process.

Going ahead to step 13:
When dividing 8200 by 860, we get 9 with a remainder of 460.
Put 9 as the next digit of the answer. 
Result so far: 7445.958139
Deduct 7740 from 8200 and we're left with 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Moving on to step 14:
When dividing 4600 by 860, we get 5 with a remainder of 300.
Put 5 as the next digit of the answer. 
Result so far: 7445.9581395
The remainder is 300 after subtracting 4300 from 4600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Let's proceed to step 15:
860 can be fit into 3000 3 times, resulting in a remainder of 420.
The next digit of our result is 3. 
Result so far: 7445.95813953
Subtracting 2580 from 3000 leaves us with 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

The quotient of the division is 7445.95813953, and the remainder is 4.2e-07.